Adhar Instrument and Services Adhar Instrument and Services Adhar Instrument and Services
Adhar Instrument and Services Adhar Instrument and Services
Adhar Instrument and Services
Adhar Instrument and Services Adhar Instrument and Services Adhar Instrument and Services Adhar Instrument and Services Adhar Instrument and Services
Adhar Instrument and Services
Adhar Instrument and Services
Adhar Instrument and Services
Borehole Rod Extensometer AIS 1500

Adhar Instrument and ServicesThe rod extensometer monitors changes in the distance between one or more downhole anchors and a reference head at the borehole collar. Typical applications include:

  • Monitoring settlement in foundations.
  • Monitoring subsidence above tunnels and mines.
  • Monitoring heave in excavations.
  • Monitoring the stability of tunnels and other underground openings.
  • Monitoring deformation in abutments and walls.


Single Point Monitoring:
The single point rod extensometer can monitor the movement between anchor and reference head. It consists of single point reference head, rod, anchor and sleeve.

Multipoint Monitoring:
The rod extensometer can monitor up to six points along the borehole. The number of monitored points is limited by the size of the borehole, the type of anchor used, the diameter of the rods, and the amount of tubing required for grouting and activating anchors.

Specifications:
Manual Reading :
Range : 50mm with depth gauge
Resolution : 0.01mm
Accuracy : ±0.05mm
Remote Reading using VW displacement sensor :
Range : 50mm and 100mm
Resolution : 0.05% of range
Accuracy : ±0.5%FS
Operating Temperature : -10 to +70°C



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